WIND GENERATOR DIY.
Wind Generator Power Equation: P=.5rAV^3CtCa
P = power in watts
r = The air density (1.2kg/m^3 @ sea level and 20° C)
A = The swept area of the turbine blades (m^2 square meters)
V = wind speed ( meters per second)
Ct= Wind turbine efficiency
Ca= Alternator efficiency
Example P=.5*1.22*1.4*4>3*.24=13 watt at 4m/sec(14.4 km/h) wind .
3 Phase PMA Alternator / Generator
rpm per volt
total resistanse of coils
voltage open circuit
12.5 volt + I * R = Voc
Example 12 rpm per volt,R=1 ohm and we want to charge 12.5 volt battery with I=2 A
12.5 + 2*1=14.5*12=174 rpm
The generator start charge in 150 rpm.
The power into battery is P=12.5*2 Watt=25 Watt
Pr=I>2*R=4*1=4 Watt
The total resistance for stator is 3x1 phase resistance R1=.35 ohm Rstator=.35x3=1.05 ohm for star connection.
If you make delta connection the total resistance is same with 1 phase resistance Rstator=.35ohm.
Star 12 rpm/volt
Delta 12x1.732=20.8rpm/volt
Delta require more rpm to start charging but for high wind speed is bettter because the power losses is lower.
3 PHASE ALTERNATOR
There are basically two types to wire a 3 phase alternator, Star and Delta.
With Delta you get lower voltage but more amps. In star you get higher voltage but less amps, resistance in Delta is 1/3 the resistance of Star.

SOLAR PANEL DIY.

SOLAR PANEL BOOSTER WITH MIRRORS 50% INCREASE THE POWER!!!
The current before boost is 0.28A, after boost with mirrors the current up to 0.41A.I put the small solar panel 5 watt inside to my solar oven at 3pm.
You risk overheating the panel for long time use after 11am and before 4pm.This is good for the morning and the afternoon when the solar radiation is low.
The best temperature for solar panel is max 42 C.Up 42 C the output power drop.
You can cool the panels with cold water with pump.
Better you must use a digital thermometer with temperature sensor for this experiment.
Look my video in YouTube.